Physiological Mechanism Regulating Light-induced Mesocotyl Elongation by Polyamine Oxidase (PAO) in Maize

张同祯,; 李永胜,; 李玥,; 姚海梅,; 赵娟,; 王婵,; 赵阳,; 王汉宁,; 方永丰,; 胡晋,

doi:10.3724/sp.j.1006.2016.00734

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…Study on maize mesocotyl showed that the activity of polyamine oxidase (PAO) was enhanced after light exposure, then after the oxidative decomposition of polyamines (Pas), H 2 O 2 was produced. Subsequently, a series of changes were induced; for instance, the oxidization production in lignin monomers, induced by peroxidase (POD), was transformed into lignin, and resulted in the hardening of cell wall and the inhibition of mesocotyl elongation (Zhang et al 2016).…”

Section: Sd3 Sd2mentioning

confidence: 99%

Mesocotyl elongation, an essential trait for dry-seeded rice (Oryza sativa L.): a review of physiological and genetic basis

Zhan

Lü

Liu

et al. 2019

Planta

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Main conclusions (1) Mesocotyl elongation is responsive to abiotic stresses, such as deep sowing drought, submergence, chilling, and salinity. (2) Humus soil culture with a burial depth of 6 cm and at the temperature of 30 °C could be the optimum method for mesocotyl length phenotyping, The frequently colocalized quantitative trait loci (QTL) controlling mesocotyl elongation were located on chromosome (3) 1 (RM562-RG146), chromosome 2 (RZ288-RM145), and chromosome 3 (RM426-RM520).

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Section: Sd3 Sd2mentioning

confidence: 99%

Mesocotyl elongation, an essential trait for dry-seeded rice (Oryza sativa L.): a review of physiological and genetic basis

Zhan

Lü

Liu

et al. 2019

Planta

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“…For example, polyamine oxidase (PAO) activity was significantly increased in maize mesocotyls cultured in a light environment. Following the oxidative decomposition of polyamines (PAs) and H 2 O 2 production, the oxidization of lignin monomers (hyproxyphenyl-, guaiacyl-, and syringyl-unit), induced by active POD, occurred, and they were subsequently transformed into lignin, resulting in the hardening of the cell wall and inhibition of mesocotyl elongation [18]. Moreover, the mutants of polyamine oxidase 5 (OsPAO5) in rice synthesized more ET and produced lower amounts of H 2 O 2 , resulting in a longer mesocotyl, faster seedling emergence, and higher yield potential [56].…”

Section: Response Mechanisms Of the Mesocotyl And Coleoptile Elongationmentioning

confidence: 99%

“…Our previous studies showed that maize seedling emergence occurs mainly through the cooperative elongation of the mesocotyl [1] and coleoptile [7]. In addition, hydrogen peroxide (H 2 O 2 ) will be accumulated in the germ while it comes out from the soil surface and has exposure to light, which inhibits the production of PAO (polyamine oxidase) inhibitor 2-HEH (2-hydroxyethyl hydrazine), resulting in a large amount of lignin accumulation and the subsequent hardening of the mesocotyl cell wall and slowing down of the mesocotyl growth [17][18][19][20][21]. There is increasing evidence that the elongation of the mesocotyl is affected by exogenous hormones, such as gibberellin A3 (GA 3 ) [22,23], indole-acetic acid (IAA) [24], salicylic acid (SA) [25], abscisic acid (ABA) [26], zeatin (ZT) [27], cytokinin (CTK) [28], ethylene (ET) [29], strigolactone (SL) [28], and brassinosteroid (BR) [30].…”

Section: Introductionmentioning

confidence: 99%

Exogenous Serotonin (5-HT) Promotes Mesocotyl and Coleoptile Elongation in Maize Seedlings under Deep-Seeding Stress through Enhancing Auxin Accumulation and Inhibiting Lignin Formation

Zhao,

Li,

Niu

et al. 2023

IJMS

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Serotonin (5-HT), an indoleamine compound, has been known to mediate many physiological responses of plants under environmental stress. The deep-seeding (≥20 cm) of maize seeds is an important cultivation strategy to ensure seedling emergence and survival under drought stress. However, the role of 5-HT in maize deep-seeding tolerance remains unexplored. Understanding the mechanisms and evaluating the optimal concentration of 5-HT in alleviating deep-seeding stress could benefit maize production. In this study, two maize inbred lines were treated with or without 5-HT at both sowing depths of 20 cm and 3 cm, respectively. The effects of different concentrations of 5-HT on the growth phenotypes, physiological metabolism, and gene expression of two maize inbred lines were examined at the sowing depths of 20 cm and 3 cm. Compared to the normal seedling depth of 3 cm, the elongation of the mesocotyl (average elongation 3.70 cm) and coleoptile (average elongation 0.58 cm), secretion of indole-3-acetic acid (IAA; average increased 3.73 and 0.63 ng g−1 FW), and hydrogen peroxide (H2O2; average increased 1.95 and 0.63 μM g−1 FW) in the mesocotyl and coleoptile were increased under 20 cm stress, with a concomitant decrease in lignin synthesis (average decreased 0.48 and 0.53 A280 g−1). Under 20 cm deep-seeding stress, the addition of 5-HT activated the expression of multiple genes of IAA biosynthesis and signal transduction, including Zm00001d049601, Zm00001d039346, Zm00001d026530, and Zm00001d049659, and it also stimulated IAA production in both the mesocotyl and coleoptile of maize seedlings. On the contrary, 5-HT suppressed the expression of genes for lignin biosynthesis (Zm00001d016471, Zm00001d005998, Zm00001d032152, and Zm00001d053554) and retarded the accumulation of H2O2 and lignin, resulting in the elongation of the mesocotyl and coleoptile of maize seedlings. A comprehensive evaluation analysis showed that the optimum concentration of 5-HT in relieving deep-seeding stress was 2.5 mg/L for both inbred lines, and 5-HT therefore could improve the seedling emergence rate and alleviate deep-seeding stress in maize seedlings. These findings could provide a novel strategy for improving maize deep-seeding tolerance, thus enhancing yield potential under drought and water stress.

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Involvement of triadimefon induced early ABA-dependent H2O2 accumulation in soybean against water stress

Xing

Tong

et al. 2020

Oil Crop Science

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Physiological Mechanism Regulating Light-induced Mesocotyl Elongation by Polyamine Oxidase (PAO) in Maize

Cited by 7 publications

References 23 publications

Mesocotyl elongation, an essential trait for dry-seeded rice (Oryza sativa L.): a review of physiological and genetic basis

Mesocotyl elongation, an essential trait for dry-seeded rice (Oryza sativa L.): a review of physiological and genetic basis

Exogenous Serotonin (5-HT) Promotes Mesocotyl and Coleoptile Elongation in Maize Seedlings under Deep-Seeding Stress through Enhancing Auxin Accumulation and Inhibiting Lignin Formation

Involvement of triadimefon induced early ABA-dependent H2O2 accumulation in soybean against water stress

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